You could try to get a GF6600GT
the bad thing with the 6600GT is it's noise. The fan starts at 100% and needs to be manually set to 60% to get to a bearable noise level.
I think there is a 7600GS for the AGP bus too but I haven't looked because the 6600GT is a nice card and I'm quite happy with it (wife's computer: e-mail reading, web browsing and tv watching are the main tasks on this pc
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